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Extravasation — refers to the leakage of a fluid out of its container. In the case of inflammation, it refers to the movement of white blood cells from the capillaries to the tissues surrounding them. In the case of malignant cancer metastasis it refers to… … Wikipedia

Extravasation — Ex*trav a*sa tion, n. [Cf. F. extravasation.] 1. The act of forcing or letting out of its proper vessels or ducts, as a fluid; effusion; as, an extravasation of blood after a rupture of the vessels. [1913 Webster] 2. (Geol.) The issue of lava and … The Collaborative International Dictionary of English